import Vue from 'vue'
import VueRouter from 'vue-router'

// 路由懒加载
const Login = () => import('../components/Login.vue')
const Home = () => import('../components/Home.vue')
const Welcome = () => import('../components/Welcome.vue')
const Users = () => import('../components/user/Users.vue')

Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  {path: '/home', component: Home,
    redirect: '/welcome',
    children: [
      { path: '/welcome', component: Welcome },
      { path: '/user/list', component: Users},
    ]
  }

]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫  
router.beforeResolve((to, from, next) => {
  // to 将要访问
  // from 从哪个路径跳转而来
  // next放行

  if (to.path === '/login') return next()

  const tokenStr = window.sessionStorage.getItem('token')

  if (!tokenStr) return next('/login')

  next()
})


export default router
